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|  MIL-B-52734C (ME)
4.5.2.12 Post-test hydraulic cleanliness. After completion of the
operational performance test and prior to delivery of the type II bridge bays
to the Government, a sample of hydraulic fluid shall be taken from one of the
quick-disconnect couplings and tested for the particle count specified in
table I. If the particle count exceeds the values in table I, the system
shall be flushed until contamination is reduced to the acceptable level.
Inability to conform to the cleanliness levels specified in table I shall
constitute failure of this test.
4.5.2.13 Reliability maintainability. Using the parameters specified in
3.16, the bay or bays shall be tested as specified herein. When tested as
specified herein, the maintenance requirements shall not exceed the
maintenance man-hours specified in 3.17 for the interior bay and ramp bay,
respectively. This test will be conducted by the Government at a site
selected by the Government. The test bridge system shall consist of a minimum
of 12 interior bays, four ramp bays, and 16 transporters (see 3.13). Testing
may be performed in still water or in water currents up to 8 feet per second.
Maintenance shall be performed in accordance with the technical manual, and at
the end of each day's mission, any damage to the bridge bays shall be repaired
prior to the next day1s mission. Failure to meet all performance requirements
of this specification, when such failure is due to faulty material or
workmanship1 shall be cause for rejection and shall be cause for refusal by
the Government to continue acceptance of production units until evidence has
been provided by the contractor that corrective action has been taken to
eliminate the deficiencies. Correction of such deficiencies shall be
accomplished by the contractor at no cost to the Government on all units
previously produced. Any such material or workmanship deficiencies will be
considered prima facie evidence that all units accepted prior to the
completion of this test are similarly deficient unless evidence to the
contrary is furnished by the contractor and such evidence is acceptable to the
contracting officer.
4.5.2.13.1 Reliability-maintainability test cycle. Reliability-
maintainability testing shall be conducted in cycles equivalent to 10 normal
bridge missions. Each such cycle shall consist of the following:
a.
9 launch/retrieve cycles.
b.
1 launch and bridge assembly.
C.
500 class 60 vehicle crossings.
d.
1 bridge disassembly and retrieval.
e.
200 miles of transporting.
4.5.2.13.2 Reliability. The test plan utilized will depend on the method
of procurement (see 6.2). Failure criteria based on 14 bay bridge.
a.
Test Plan I - Utilized for interior bays if procured separately. Test
for ten cycles (1200 overall deployments) as specified in 4.5.2.13.1.
If less than 67 failures out of 1200 deployments occur, reliability
is acceptable. If any time during the test 67 failures occur,
reliability is not acceptable and the test is terminated.
b.
Test Plan II - Utilized for ramp bays if procured separately. Test
each pair of bays for five cycles (50 deployments per bay) 200
deployments overall) as specified in 4.5.2.13.1. If less than 17
failures out of 200 deployments occur, reliability is acceptable. If
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